Improvement in locomotive spark and smoke-conductors



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Letters Patent No. 90,899, lated .ufnfe 1, 1869.

IMPROVEBIENT IN LOCOMOTIVE SPARK AND SMDKE-CONDUCTORS.

The Schedule referred to inthese Letters Patent and making part of the same.

To all whom, it mwy concern:

Beit known that I, JOHN VIALL, of Somerville, in the county of Middlesex,v and State of Massachusetts, have invented a new and useful Improvement in Smoke and Spark-Conductors for Locomotives, of which the following is a full, clear, and exactdescription, reference being had to the accompanying drawing, forming part of this specification, and in which Figure 1 represents a side view of a smoke and spark-conductor constructed in accordance with my improvement, and

Figure 2, alongitudinal section of the same at right angles to iig. l.

Similar letters of reference indicate corresponding parts.

The object of this invention is to obviate the annoyance to passengers in railroad-cars from smoke and sparks, and coal or cinder carried along with the latter from the locomotive or engine attached to said cars.

By the present improvement, the smoke, sparks, Ste., are carried to an outlet or outlets at or near the rails, under the engine, and passed oi', by the under draught of `-the train in motion, to the rear, where, in afterwards rising, they will prove no annoyance. lo this end,

The invention consists in'a peculiar downward arrangement of the smoke-pipe or chimney of the locomotive, with air-tubes or delectors, operating to convey air from the outside to create a downward draught.

Referring to the accompanying drawing, the locomotive-engine smoke-pipe or chimney there represented, is of a double or divided form, the same being made with a central short inlet or branch, a, which is designed to connectat its bottom, either directly or through a short pipe indirectly', with the smoke-box of the boiler, and opening above into a crown or head, I), in which may be arranged a deector, c, which connects with legs or side-iiuesd d, open at their bottoms, and that are extended to nearly the level of the rails, or thereabouts.

The crown b may be of spherical, and side-fines d d of oval configuration, to lessen atmospheric resistance when the train is in motion, and the several parts should be so proportioned as not to interfere with the machineryof the locomotive on either side of it.

Through the outsides of these downward ues or legs d d, projecting into the interior of them, are airdeflecting tubes, e, having bonnets, j, to aid in directing the air to and through them.

These tubes are set so as to produce a series of downward currents of atmospheric air from the out side, within or through the legs, and should be in double sets or rows, with revcrsely-arlanged bonnets to catch and conduct the air in both directions of the engines travel.

Arranged at or near the bottoms of these leg-dues I d d, are swinging grates or screens g.

From 'this description it will be seen that by the aid of the air-detlecting tubes e, and downward direction of the side or leg-fines d d, a strong downward draught is produced, and that the smoke and sparks are passed off below in the vicinity of the rails, while the cinders, or suoli portions of matter as are not thus passed oli' with the smoke, are caught by the screens g, and may be dumped, as required, in any place of safety.

What is here claimed, and desired to be secured by Letters Patent, is-

1. A smoke and spark-condnctor, having a downward draught, as described, and provided with deflecting-tnbes, arranged to convey air from the exterior down within the conductor, substantially as specified.

2. The arrangement of the inlet a, the crown or head b, and the side or leg-dues d d, with their deilecting-tubes and bonnets, operating to establish a downward draught, essentially as herein set forth.

3. The combination, with a smoke and spark-con ductor, provided with air-deflecting tubes to create a 'downward draught through it, as described, of a lower screen or screens, arranged to swing, or open and close, substantially as and for the purpose herein specified.

v J NO. VIALL.

Witnesses:

STEPHEN G. NASH, WM. H. SIMPSON. 

